A. R. Azli and M. F. Yaakub, “Conceptual Design of a Small Helicopter”, rpmme, vol. 2, no. 2, pp. 1042–1054, Jan. 2022, Accessed: May 02, 2024. [Online]. Available: https://publisher.uthm.edu.my/periodicals/index.php/rpmme/article/view/4893